Copying sheets



y 1933. c. 1.. H. SUPLIGEAU ET AL 1,911,592

METHOD FOR FORMING COPYING SHEETS Filed Jan. 31, 1931 2 Sheets-Sheet lRobzrf-Rnch d 7mm Guyot IN (Etch) y Emit y 30, 1933- c. L. H. SUPLIGEAUEl AL 1,592

METHOD FOR FORMING COPYING SHEETS Filed Jan. 31. 1931 2 Sheets-Sheet 2Patented May 30, 1933 CHARLES LE ON HIPPOLYTE SUPLIGEAU, OF

PATENT OFFICE MALAKOFF, AND ROBERT RICHARD JEAN GUYOT, OFCHATILLON-SOUS, BAGNEUX, FRANCE METHOD FOR FORMING COPYING SHEETSApplication filed January 31, 1931, Serial No.

The present invention relates to methods, apparatus and compositions ofmatter for forming copying sheets and, more particularly, those of thetype provided with limited copying areas.

In forming copying sheets having limited copying areas, it has been thepractice to cover portions of one side of a sheet of paper with a layerof copying composition similar to that employed on'ordinary carbonpapers. Inasmuch as these sheets frequently carried printed captions orother indications on one side, it was necessary to find means forspreading the copying composition so as to cover certain definite,limit-ed regions of the reverse side. Ordinary printing rolls were, atfirst, tried, but, since the portions carrying the copying mixture (ink)extended beyond the surface of the printing roll, the paper wasfrequently torn. It was then at tempted to carry out the same operationby using rolls provided with depressions or recesses corresponding inform to the area designed. to receive the copying mixture; but in thiscase the copying composition or ink, when applied to the paper, spreadat the edges.

One of the objects of the present invention is to provide a method,apparatus and composition capable of being applied to a paper so thatthe edges limiting the copying area are perfectly defined.

Another object is to provide a method for rapidly applying copyingcomposition to either one or both sides of the sheet of pa- Furtherobjects will appear in the course of the detailed description now to begiven with reference to the accompanying drawings, in which:

Fig. 1 is a diagrammatic section showing one constructive embodiment ofthe invention; Y

Fig. 2 represents, in perspective, a printing roll designed to be usedfor carrying out the invention;

Fig. 2A is a section through the surface of the printing roll showing,in magnified form, the form of the impressions;

Figs. 3 and 4 are two other illustrative em- 512,672, and in BelgiumFebruary 14, 1930.

bodirnents of the invention showing how copying composition may beapplied to one or both sides of a sheet.

Referring to Figs. 1, 2 and 2A of the drawings, there is shown anassembly composed of a support 1 for a stack of paper, a runway or guide2 feeding a pressure cylinder 3 provided interiorly with means for beingcooled by a refrigerating liquid, a. printing cylinder 4 to be describedin detail further on, a steamjacketed tank 5 adapted to receive copyingmixture or ink, a feed cylinder 6 provided with steam, electric orhot-air heating means and driven in any convenient way, a. roll 7regulating the amount of ink carried by cylinder 6, an inking roll 8adapted to transfer the ink from feed-roll (i printing cylinder 4, asqueegee or scraper 13 adapted to remove the ink from all portions ofprinting roll 4 except those engraved, a pair of pulleys 9 and 10carrying a belt 11 adapted to reeeive the inked sheets from roll 3, anda support 12 adapted to receive and stack the finished sheets.

Printing rolls 1 are similar to those commonly used in heliograving,rotograving and the like and have a plurality of microscopic lines ofcapillary dimensions formed therein (see Fig. 2A) intersecting oneanother, preferably at right angles, and lying out of parallelism withthe generatrices of the printing roll. Those portions of the roll notruled are perfectly smooth and cylindrical.

The manner in which the apparatus operates is practically evident froman inspection of the drawings. Paper fed from stack 1 along guide 2slides onto cylinder 3 and receives a coat of inking mixture from printing roll 4, the latter being supplied with ink from reservoir 5 byelements 6, 7 and 8 in a manner which is perfectly obvious. Scraper 13removes ink from all areas other than those engraved and the finishedarticle is carried. off by belt 11 to be stacked on support 12. It is tobe noted that while bath 5, feed and printing roll 4 are heated, roll 3is cooled by a refrigerating mixture in any convenient manner desired.This is done so that the copying mixture, which is rich in waxes andsimilar excipients,-may be solidi- Carnauba wax 7 parts Montan wax(refined) 3 parts Vaseline (white) 14 parts Pigment (lake or the likeformed from an aniline base and an aluminium salt) Quantities sulficientThe quantity of pigment as well as its character may be changed at willin accordance with the color desired and its intensity. Where deepcolors are to be employed, stearates or oleates may be used.

The above-described composition is solid at room temperatures andbecomes liquid when heated in a steam-jacketed vessel of the type oftank Its liquid condition is maintained during passage over elements 6and 8 to printing roll 4 by any convenient form of steam, electric orother heating system fitted to the latter.

Referring now to Fig. 3 of the drawings, an assembly similar to the onerepresented in Fig. 1 is shown including a paper roll 14 feeding aseries of guides 15 and 19, the latter guide being displaceable inVertical directions so as to vary the papers tension,a printing roll 16immersed in a heated bath 17 containing inking mixture and fitted with ascraper 18, siminar to element 13 in Fig. 1, roll 16, being heated,acooled roller 20 out of line with printing roll 16 and adapted to effectsolidification of the copying mixture applied by the latter, roll 20being displaceable if de- 'sired,driving rolls 21 and 22 adapted to drawthe paper over cooling roll 20 from feed roll 14,a pair of guides 23 forthe finished article onto a stack support 24,-and means of anyconvenient design interposedbetween elements 21, 22 and guides 23 forsectioning the inked paper into proper lengths.

The operation of this form of assembly, with the exception of beingcontinuous, is substantially the same as that of the one shown in Fig.1, such elements as 7 and 8, 9, 10 and 11 being omitted. If the papercoiled on roll 14 be already printed on one side, the other side willcarry limited areas of copying composition properly positioned withrespect to the printed areas.

The assembly represented in Fig. 4 differs from the one shown in Fig. 3only in the adjunction of a second series of ink-applying elementsadapted to spread inking composition on the opposite side of the paperreceiving ink from roll 16. Inking composition is first applied to oneside of the paper by the elements numbered 14 to 20, then passes over adisplaceable idler 28, similar to element 19, and finally passes over atrain 25, 26, 27, similar to elements 16, 17 and 18 positioned so as toapply ink to the face opposite that in contact with printing roll 16.Printing roll 25 and bath 26 are heated and the paper coming from thelatter is cooled by a pair of cooled air blasts 29 directed againstopposite faces of the sheet. Further cooling may be effected by rolls30, 31 and 32, 33 and the sheet may be cut at 34 to be delivered byguides 35 to stack support 36.

lVhat we claim is 1. The method of making carbon copying sheets havinglimited copying areas comprising applying a heated copying compositionto paper by means of a heated printing roll having a photo-engravedmicroscopic intaglio surface and cooling the paper directly afterprinting.

2. The method of making carbon copying sheets having limited copyingareas comprising applying a heated copying composition to paper by meansof a heated printing roll having photo-engraved intersecting microscopiclines and cooling the paper directly after printing.

In testimony whereof we affix our signatures. CHARLES LEON HIPPOLYTESUPLIGEAU.

ROBERT RICHARD JEAN GUYOT.

